Imitation rubber and process of manufacturing the same



Patented Dec. 5, 1933 V IMITATION RUBBER AND PROCESS OF MANUFACTURINGTHE SAME Shozo Fuji and Tatsuzo Fukuda, Utsunomiya- Shi,

Japan No Drawing. Application May 15, 1931 Serial No. 537,750

2 Claims.

This invention has relation to the manufacture or production ofimitation rubber from vegetable oils by the action of lead salts and theobject of the invention is to produce a lead salt of fatty 5 acid in theform of a liquid of viscous character having the properties to a certainextent of natu-' ral rubber and which may be used as a substitutetherefor in many industries, being, when dry, flexible, elastic andtransparent also insoluble in dilute mineral salts or fatty acids, andbeing also waterproof.

In carrying our invention into effect, we heat a vegetable oil such asthe oil of perilla coimoides to 250 C., stirring the same strongly andwe then add slowly 510% of lead carbonate and then heat them step bystep to 300 C., and after being stirred for about thirty minutes in thesame condition, carbonic acid gas escapes therefrom as bubbles.

When the mixtures'have been allowed to cool to 200 0., there appears ayellowish brown'viscous liquid on the surface in which lead salts offatty acids are the main components.

This liquid consists of different formations by the quantity of leadsalt, and there may be derived various viscous liquids by the process.Several liquids can be obtained for use in painting upon paper or cloth.The liquid will permeate the material to which it is applied, and whenthe material is dried in the air the liquid absorbs oxygen andsolidifies, thus producing the required This imitation rubber. or rubbersubstitute is elastic and flexible yet will not dissolve in dilute-mineral salts or fatty solvents.

Shiny films, are produced, which are heat proof and water proof and aresimilar to natural rubber in external appearance and will not harden ortemperature.

and to the sense of touch slacken under changes in The liquid materialwhen pamted on the surface of metal or woodis stainless andanti-septical and also when painted on the surface of cloth has theeffect of protecting the same from moisture.

We claim:

1. The process for th e productionof imitation oil to form a lead saltof the oil, whereby a rubberlike material is obtained. I

2; A viscous rubber like product resulting from the reaction of 5 to 10%of lead carbonate on a vegetable oil, which product, on exposure to air,congeals, is flexible and transparent and is insoluble in water, fattysalts;

acids or dilute mineral SI-IOZO FUJI. TATSUZO FUKUDA.

